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China'sicebreakerXuelong 

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问题详情:

China'sicebreakerXuelong 

China's icebreaker Xuelong  ______  by heavy floes since Friday after rescuing passengers on a Russian vessel stranded in Antarctica.

A. has been trapped                    B. had been trapped

C. has trapped                         D. was trapped

【回答】

A

知识点:现在完成时及其被动式

题型:选择题

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